WordPress Automatic Plugin can import from Youtube to wordpress and to import trending videos follow these tips

Youtube creates a playlist for trending videos and fortunately WordPress Automatic Plugin can post from playlists

For example this is the playlist for trending videos at US

https://www.youtube. com/playlist?list=PLrEnWoR732-BHrPp_Pm8_VleD68f9s14-

So copy the id of the playlist to the plugin campaign playlist field

To find the trending playlist and other playlists visit browse channels when not logged in to Youtube